USB sharing switcher、 perfect for securities market、 education such fields; Connects a USB device such as a printer or scanner and use it from four computers; Switching method: Panel key switch Keyboard shortcut keys to switch (Ctrl+F11). Dimensions: 4.02 in x 2.01 in x 0.83 in (10.2 cm x 5.1 cm x 2.1 cm) Weight: 2.05 oz (58 g)